HBase 6、用Phoenix Java api操作HBase

开发环境准备:eclipse3.5jdk1.7window8hadoop2.2.0hbase0.98.0.2phoenix4.3.0

  1、从集群拷贝以下文件:core-site.xmlhbase-site.xmlhdfs-site.xml文件放到工程src

  2、把phoenixphoenix-4.3.0-client.jarphoenix-core-4.3.0.jar添加到工程classpath

  3、配置集群中各节点的hosts文件,把客户端的hostnameIP添加进去

  4、在客户端host文件中加入集群的hostnameIP

  5、工程截图

   

  例子1:

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.Statement;

public class Phoenix_Test {
	/**
	 * 使用phoenix提供的api操作hbase读取数据
	 */
	public static void main(String[] args) throws Throwable {
		try {
			// 下面的驱动为Phoenix老版本使用2.11使用,对应hbase0.94+
			// Class.forName("com.salesforce.phoenix.jdbc.PhoenixDriver");

			// phoenix4.3用下面的驱动对应hbase0.98+
			Class.forName("org.apache.phoenix.jdbc.PhoenixDriver");
		} catch (Exception e) {
			e.printStackTrace();
		}
		// 这里配置zookeeper的地址,可单个,也可多个。可以是域名或者ip
		String url = "jdbc:phoenix:node5,node6,node7";
		// String url =
		// "jdbc:phoenix:41.byzoro.com,42.byzoro.com,43.byzoro.com:2181";
		Connection conn = DriverManager.getConnection(url);
		Statement statement = conn.createStatement();
		String sql = "select count(1) as num from WEB_STAT";
		long time = System.currentTimeMillis();
		ResultSet rs = statement.executeQuery(sql);
		while (rs.next()) {
			int count = rs.getInt("num");
			System.out.println("row count is " + count);
		}
		long timeUsed = System.currentTimeMillis() - time;
		System.out.println("time " + timeUsed + "mm");
		// 关闭连接
		rs.close();
		statement.close();
		conn.close();
	}
}

  执行结果:

  

  例子2:

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.Statement;

public class Phoenix_Test2 {
	/**
	 * 使用phoenix提供的api操作hbase中读取数据
	 */
	public static void main(String[] args) throws Throwable {
		try {
			//下面的驱动为Phoenix老版本使用2.11使用,对应hbase0.94+
			//Class.forName("com.salesforce.phoenix.jdbc.PhoenixDriver");
			//phoenix4.3用下面的驱动对应hbase0.98+
			Class.forName("org.apache.phoenix.jdbc.PhoenixDriver");
		} catch (Exception e) {
			e.printStackTrace();
		}
		//这里配置zk的地址,可单个,也可多个。可以是域名或者ip
		String url = "jdbc:phoenix:node5,node6,node7";
		Connection conn = DriverManager.getConnection(url);
		Statement statement = conn.createStatement();
		String sql = "select *  from web_stat where core = 1";
		long time = System.currentTimeMillis();
		ResultSet rs = statement.executeQuery(sql);
		while (rs.next()) {
			//获取core字段值
			int core = rs.getInt("core");
			//获取core字段值
			String host = rs.getString("host");
			//获取domain字段值
			String domain = rs.getString("domain");
			//获取feature字段值
			String feature = rs.getString("feature");
			//获取date字段值,数据库中字段为Date类型,这里代码会自动转化为string类型
			String date = rs.getString("date");
			//获取db字段值
			String db = rs.getString("db");
			System.out.println("host:"+host+"\tdomain:"+domain+"\tfeature:"+feature+"\tdate:"+date+"\tcore:" + core+"\tdb:"+db);
		}
		long timeUsed = System.currentTimeMillis() - time;
		System.out.println("time " + timeUsed + "mm");
		//关闭连接
		rs.close();
		statement.close();
		conn.close();
	}
}

  执行结果:

  

posted @ 2016-03-11 21:40  Bodi  阅读(11751)  评论(4编辑  收藏  举报